白细胞介素2致痫与蛋白酪氨酸激酶/信号转导子和转录激活子信号转导途径的关系

目的 研究白细胞介素2(IL-2)致痫与蛋白酪氨酸激酶(Jak)/信号转导子和转录激活子(Stats)信号转导途径的关系.方法用免疫细胞化学方法研究IL-2致痫大鼠脑内蛋白酪氨酸激酶Jak1的表达变化,及预先应用Jak1抑制剂和糖皮质激素干预后,再用IL-2致病后脑内N-甲基-D天门冬氨酸型受体-1(NMDAR-1)和谷氨酸(Glu)的表达变化.结果侧脑室注射IL-2后大鼠出现明显的癫痫发作,其Jak1的表达较对照组明显增强(P<0.01),免疫抑制剂环孢霉索可部分抑制此效应;Jak1抑制剂植物异黄酮和免疫抑制剂糖皮质激素可明显抑制IL-2致痫大鼠的癫痫行为,其NMDAR-1和Glu的表达较IL-2组显著降低(P<0.05).结论在IL-2致癌中,Jak1在其信号转导途径中发挥重要作用.     

Functional conservation of suppressors of cytokine signaling proteins between teleosts and mammals: Atlantic salmon SOCS1 binds to JAK/STAT family members and suppresses type I and II IFN signaling

Suppressor of cytokine signaling (SOCS) proteins are crucially involved in the control of inflammatory responses through their impact on various signaling pathways including the JAK/STAT pathway. Although all SOCS protein family members are identified in teleost fish, their functional properties in non-mammalian vertebrates have not been extensively studied. To gain further insight into SOCS functions in bony fish, we have identified and characterized the Atlantic salmon (Salmo salar) SOCS1, SOCS2 and CISH genes. These genes exhibited sequence conservation with their mammalian counterparts and they were ubiquitously expressed. SOCS1 in mammalian species has been recognized as a key negative regulator of interferon (IFN) signaling and recent data for the two model fish Tetraodon (Tetraodon nigroviridis) and zebrafish (Danio rerio) suggest that these functions are conserved from teleost to mammals. In agreement with this we here demonstrate a strong negative regulatory activity of salmon SOCS1 on type I and type II IFN signaling, while SOCS2a and b and CISH only moderately affected IFN responses. SOCS1 also inhibited IFNγ-induced nuclear localization of STAT1 and a direct interaction between SOCS1 and STAT1 and between SOCS1 and the Tyk2 kinase was found. Using SOCS1 mutants lacking either the KIR domain or the ESS, SH2 and SOCS box domains showed that all domains affected the ability of SOCS1 to inhibit IFN-mediated signaling. These results are the first to demonstrate that SOCS1 is a potent inhibitor of IFN-mediated JAK-STAT signaling in teleost fish.     

基于嵌入式Web服务器的心电远程监护系统

目的设计一种基于嵌入式Web服务器的心电远程监护系统。方法采用低功耗ARM9微处理器为核心的开发板,移植嵌入式Linux系统和Web服务器,通过JavaApplet和CGI设计开发,利用动态网页实现心电信号的远程实时监护。结果设计的心电记录器能准确地采集和显示各类心电信号,浏览器端能动态显示心电波形和分析结果,可准确实时地进行远程监护。结论本系统操作方便、成本低,实现了现有动态心电监护仪缺乏的实时监测,适合家庭和社区的心电监护。     

嵌入式QT环境下的QRS波群实时检测与分析

目的 QRS波群的检测是心电图分析的核心技术之一.本文在嵌入式QT环境下实现了一套QRS波群实时检测与分析系统.方法 系统采用四点平均对ECG信号进行滤波,再对ECG信号的一二阶差分值进行平滑处理,然后在较短时间窗内实现QRS波的实时精确定位.最后采用MIT-BIH标准数据库对算法效果进行分析.结果 对于MIT-BIH标准数据库中的绝大部分心电数据,改进后的算法有96％以上的准确率,运行时间在1ms左右.结论 改进后的算法能够满足远程终端对准确率和运行时间的要求.     

TRARESA: a tissue microarray-based hospital system for biomarker validation and discovery

Formalin fixed and paraffin embedded tissue (FFPE) collections in pathology departments are the largest resource for retrospective biomedical research studies. Based on the literature analysis of FFPE related research, as well as our own technical validation, we present the Translational Research Arrays (TRARESA), a tissue microarray centred, hospital based, translational research conceptual framework for both validation and/or discovery of novel biomarkers. TRARESA incorporates the analysis of protein, DNA and RNA in the same samples, correlating with clinical and pathological parameters from each case, and allowing (a) the confirmation of new biomarkers, disease hypotheses and drug targets, and (b) the postulation of novel hypotheses on disease mechanisms and drug targets based on known biomarkers. While presenting TRARESA, we illustrate the use of such a comprehensive approach. The conceptualisation of the role of FFPE-based studies in translational research allows the utilisation of this commodity, and adds to the hypothesis-generating armamentarium of existing high-throughput technologies.     

基于PDA的嵌入式ECG监护分析仪

目的为了方便快捷地实时监测心律失常,设计一种基于PDA的嵌入式ECG监护分析仪。方法仪器功能包括低功耗MSP430系列单片机控制心电信号的采集、放大、滤波、转换和在PDA上实时显示、存储和分析,并实现心电数据的远程传输。对仪器工作原理进行分析,把监护分析仪总体结构划分为子模块,并具体介绍各子模块的功能与实现。结果与结论与医院现有的三导全自动心电图机、Holter动态心电图机进行对照,本监护分析仪携带方便、操作简单、接收的心电信号无失真,连续工作时间大于20h等。各高频干扰信号对ECG信号无影响;软件可对心电信号进行实时显示,可连续记录15h的原始心电数据。